<?php
/*
    pDraw - pChart core class

    Version     : 2.1.4
    Made by     : Jean-Damien POGOLOTTI
    Last Update : 19/01/2014

    This file can be distributed under the license you can find at :

                      http://www.pchart.net/license

    You can find the whole class documentation on the pChart web site.
*/

/* The GD extension is mandatory */
if (!extension_loaded('gd') && !extension_loaded('gd2')) {
    echo "GD extension must be loaded. \r\n";
    exit();
}

/* Image map handling */
define("IMAGE_MAP_STORAGE_FILE", 680001);
define("IMAGE_MAP_STORAGE_SESSION", 680002);

/* Last generated chart layout */
define("CHART_LAST_LAYOUT_REGULAR", 680011);
define("CHART_LAST_LAYOUT_STACKED", 680012);

/* ImageMap string delimiter */
define("IMAGE_MAP_DELIMITER", chr(1));

class pImage extends pDraw
{
    /* Image settings, size, quality, .. */
    public $XSize = NULL;                // Width of the picture
    public $YSize = NULL;                // Height of the picture
    public $Picture = NULL;                // GD picture object
    public $Antialias = TRUE;                // Turn antialias on or off
    public $AntialiasQuality = 0;                // Quality of the antialiasing implementation (0-1)
    public $Mask = "";                // Already drawn pixels mask (Filled circle implementation)
    public $TransparentBackground = FALSE;            // Just to know if we need to flush the alpha channels when rendering

    /* Graph area settings */
    public $GraphAreaX1 = NULL;                // Graph area X origin
    public $GraphAreaY1 = NULL;                // Graph area Y origin
    public $GraphAreaX2 = NULL;                // Graph area bottom right X position
    public $GraphAreaY2 = NULL;                // Graph area bottom right Y position

    /* Scale settings */
    public $ScaleMinDivHeight = 20;                // Minimum height for scame divs

    /* Font properties */
    public $FontName = "fonts/GeosansLight.ttf";    // Default font file
    public $FontSize = 12;                // Default font size
    public $FontBox = NULL;                // Return the bounding box of the last written string
    public $FontColorR = 0;                // Default color settings
    public $FontColorG = 0;                // Default color settings
    public $FontColorB = 0;                // Default color settings
    public $FontColorA = 100;                // Default transparency

    /* Shadow properties */
    public $Shadow = FALSE;            // Turn shadows on or off
    public $ShadowX = NULL;                // X Offset of the shadow
    public $ShadowY = NULL;                // Y Offset of the shadow
    public $ShadowR = NULL;                // R component of the shadow
    public $ShadowG = NULL;                // G component of the shadow
    public $ShadowB = NULL;                // B component of the shadow
    public $Shadowa = NULL;                // Alpha level of the shadow

    /* Image map */
    public $ImageMap = NULL;                // Aray containing the image map
    public $ImageMapIndex = "pChart";            // Name of the session array
    public $ImageMapStorageMode = NULL;            // Save the current imagemap storage mode
    public $ImageMapAutoDelete = TRUE;            // Automatic deletion of the image map temp files

    /* Data Set */
    public $DataSet = NULL;                // Attached dataset

    /* Last generated chart info */
    public $LastChartLayout = CHART_LAST_LAYOUT_REGULAR;    // Last layout : regular or stacked

    /* Class constructor */
    public function __construct($XSize, $YSize, $DataSet = NULL, $TransparentBackground = FALSE)
    {
        $this->TransparentBackground = $TransparentBackground;

        if ($DataSet != NULL) {
            $this->DataSet = $DataSet;
        }

        $this->XSize = $XSize;
        $this->YSize = $YSize;
        $this->Picture = imagecreatetruecolor($XSize, $YSize);

        if ($this->TransparentBackground) {
            imagealphablending($this->Picture, FALSE);
            imagefilledrectangle($this->Picture, 0, 0, $XSize, $YSize, imagecolorallocatealpha($this->Picture, 255, 255, 255, 127));
            imagealphablending($this->Picture, TRUE);
            imagesavealpha($this->Picture, true);
        } else {
            $C_White = $this->AllocateColor($this->Picture, 255, 255, 255);
            imagefilledrectangle($this->Picture, 0, 0, $XSize, $YSize, $C_White);
        }
    }

    /* Enable / Disable and set shadow properties */
    /* 设置阴影 */
    function setShadow($Enabled = TRUE, $Format = "")
    {
        $X = isset($Format["X"]) ? $Format["X"] : 2;
        $Y = isset($Format["Y"]) ? $Format["Y"] : 2;
        $R = isset($Format["R"]) ? $Format["R"] : 0;
        $G = isset($Format["G"]) ? $Format["G"] : 0;
        $B = isset($Format["B"]) ? $Format["B"] : 0;
        $Alpha = isset($Format["Alpha"]) ? $Format["Alpha"] : 10;

        $this->Shadow = $Enabled;
        $this->ShadowX = $X;
        $this->ShadowY = $Y;
        $this->ShadowR = $R;
        $this->ShadowG = $G;
        $this->ShadowB = $B;
        $this->Shadowa = $Alpha;
    }

    /* Set the graph area position */
    /* 设置图形区域的位置 */
    function setGraphArea($X1, $Y1, $X2, $Y2)
    {
        if ($X2 < $X1 || $X1 == $X2 || $Y2 < $Y1 || $Y1 == $Y2) {
            return (-1);
        }

        $this->GraphAreaX1 = $X1;
        $this->DataSet->Data["GraphArea"]["X1"] = $X1;
        $this->GraphAreaY1 = $Y1;
        $this->DataSet->Data["GraphArea"]["Y1"] = $Y1;
        $this->GraphAreaX2 = $X2;
        $this->DataSet->Data["GraphArea"]["X2"] = $X2;
        $this->GraphAreaY2 = $Y2;
        $this->DataSet->Data["GraphArea"]["Y2"] = $Y2;
    }

    /* Return the width of the picture */
    /* 取得图片宽度 */
    function getWidth()
    {
        return ($this->XSize);
    }

    /* Return the heigth of the picture */
    /* 取得图片高度 */
    function getHeight()
    {
        return ($this->YSize);
    }

    /* Render the picture to a file */
    /* 返回一个作为一个文件 */
    function render($FileName)
    {
        if ($this->TransparentBackground) {
            imagealphablending($this->Picture, false);
            imagesavealpha($this->Picture, true);
        }
        imagepng($this->Picture, $FileName);
    }

    /* Render the picture to a web browser stream */
    /* 返回一个图片流 */
    function stroke($BrowserExpire = FALSE)
    {
        if ($this->TransparentBackground) {
            imagealphablending($this->Picture, false);
            imagesavealpha($this->Picture, true);
        }

        if ($BrowserExpire) {
            header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
            header("Cache-Control: no-cache");
            header("Pragma: no-cache");
        }

        header('Content-type: image/png');
        imagepng($this->Picture);
    }

    /* Automatic output method based on the calling interface */
    /* 保存图片 */
    function autoOutput($FileName = "output.png")
    {
        if (php_sapi_name() == "cli")
            $this->Render($FileName);
        else
            $this->Stroke();
    }

    /* Return the length between two points */
    /* 返回两个点之间的长度 */
    function getLength($X1, $Y1, $X2, $Y2)
    {
        return (sqrt(pow(max($X1, $X2) - min($X1, $X2), 2) + pow(max($Y1, $Y2) - min($Y1, $Y2), 2)));
    }

    /* Return the orientation of a line */
    /* 返回一行 */
    function getAngle($X1, $Y1, $X2, $Y2)
    {
        $Opposite = $Y2 - $Y1;
        $Adjacent = $X2 - $X1;
        $Angle = rad2deg(atan2($Opposite, $Adjacent));
        if ($Angle > 0) {
            return ($Angle);
        } else {
            return (360 - abs($Angle));
        }
    }

    /* Return the surrounding box of text area */
    /* 返回文本区域的周围的框 */
    function getTextBox_deprecated($X, $Y, $FontName, $FontSize, $Angle, $Text)
    {
        $Size = imagettfbbox($FontSize, $Angle, $FontName, $Text);
        $Width = $this->getLength($Size[0], $Size[1], $Size[2], $Size[3]) + 1;
        $Height = $this->getLength($Size[2], $Size[3], $Size[4], $Size[5]) + 1;

        $RealPos[0]["X"] = $X;
        $RealPos[0]["Y"] = $Y;
        $RealPos[1]["X"] = cos((360 - $Angle) * PI / 180) * $Width + $RealPos[0]["X"];
        $RealPos[1]["Y"] = sin((360 - $Angle) * PI / 180) * $Width + $RealPos[0]["Y"];
        $RealPos[2]["X"] = cos((270 - $Angle) * PI / 180) * $Height + $RealPos[1]["X"];
        $RealPos[2]["Y"] = sin((270 - $Angle) * PI / 180) * $Height + $RealPos[1]["Y"];
        $RealPos[3]["X"] = cos((180 - $Angle) * PI / 180) * $Width + $RealPos[2]["X"];
        $RealPos[3]["Y"] = sin((180 - $Angle) * PI / 180) * $Width + $RealPos[2]["Y"];

        $RealPos[TEXT_ALIGN_BOTTOMLEFT]["X"] = $RealPos[0]["X"];
        $RealPos[TEXT_ALIGN_BOTTOMLEFT]["Y"] = $RealPos[0]["Y"];
        $RealPos[TEXT_ALIGN_BOTTOMRIGHT]["X"] = $RealPos[1]["X"];
        $RealPos[TEXT_ALIGN_BOTTOMRIGHT]["Y"] = $RealPos[1]["Y"];

        return ($RealPos);
    }

    /* Return the surrounding box of text area */
    /* 返回文本区域的周围的框 */
    function getTextBox($X, $Y, $FontName, $FontSize, $Angle, $Text)
    {
        $coords = imagettfbbox($FontSize, 0, $FontName, $Text);

        $a = deg2rad($Angle);
        $ca = cos($a);
        $sa = sin($a);
        $RealPos = array();
        for ($i = 0; $i < 7; $i += 2) {
            $RealPos[$i / 2]["X"] = $X + round($coords[$i] * $ca + $coords[$i + 1] * $sa);
            $RealPos[$i / 2]["Y"] = $Y + round($coords[$i + 1] * $ca - $coords[$i] * $sa);
        }

        $RealPos[TEXT_ALIGN_BOTTOMLEFT]["X"] = $RealPos[0]["X"];
        $RealPos[TEXT_ALIGN_BOTTOMLEFT]["Y"] = $RealPos[0]["Y"];
        $RealPos[TEXT_ALIGN_BOTTOMRIGHT]["X"] = $RealPos[1]["X"];
        $RealPos[TEXT_ALIGN_BOTTOMRIGHT]["Y"] = $RealPos[1]["Y"];
        $RealPos[TEXT_ALIGN_TOPLEFT]["X"] = $RealPos[3]["X"];
        $RealPos[TEXT_ALIGN_TOPLEFT]["Y"] = $RealPos[3]["Y"];
        $RealPos[TEXT_ALIGN_TOPRIGHT]["X"] = $RealPos[2]["X"];
        $RealPos[TEXT_ALIGN_TOPRIGHT]["Y"] = $RealPos[2]["Y"];
        $RealPos[TEXT_ALIGN_BOTTOMMIDDLE]["X"] = ($RealPos[1]["X"] - $RealPos[0]["X"]) / 2 + $RealPos[0]["X"];
        $RealPos[TEXT_ALIGN_BOTTOMMIDDLE]["Y"] = ($RealPos[0]["Y"] - $RealPos[1]["Y"]) / 2 + $RealPos[1]["Y"];
        $RealPos[TEXT_ALIGN_TOPMIDDLE]["X"] = ($RealPos[2]["X"] - $RealPos[3]["X"]) / 2 + $RealPos[3]["X"];
        $RealPos[TEXT_ALIGN_TOPMIDDLE]["Y"] = ($RealPos[3]["Y"] - $RealPos[2]["Y"]) / 2 + $RealPos[2]["Y"];
        $RealPos[TEXT_ALIGN_MIDDLELEFT]["X"] = ($RealPos[0]["X"] - $RealPos[3]["X"]) / 2 + $RealPos[3]["X"];
        $RealPos[TEXT_ALIGN_MIDDLELEFT]["Y"] = ($RealPos[0]["Y"] - $RealPos[3]["Y"]) / 2 + $RealPos[3]["Y"];
        $RealPos[TEXT_ALIGN_MIDDLERIGHT]["X"] = ($RealPos[1]["X"] - $RealPos[2]["X"]) / 2 + $RealPos[2]["X"];
        $RealPos[TEXT_ALIGN_MIDDLERIGHT]["Y"] = ($RealPos[1]["Y"] - $RealPos[2]["Y"]) / 2 + $RealPos[2]["Y"];
        $RealPos[TEXT_ALIGN_MIDDLEMIDDLE]["X"] = ($RealPos[1]["X"] - $RealPos[3]["X"]) / 2 + $RealPos[3]["X"];
        $RealPos[TEXT_ALIGN_MIDDLEMIDDLE]["Y"] = ($RealPos[0]["Y"] - $RealPos[2]["Y"]) / 2 + $RealPos[2]["Y"];

        return ($RealPos);
    }

    /* Set current font properties */
    /* 设置当前的字体属性 */
    function setFontProperties($Format = "")
    {
        $R = isset($Format["R"]) ? $Format["R"] : -1;
        $G = isset($Format["G"]) ? $Format["G"] : -1;
        $B = isset($Format["B"]) ? $Format["B"] : -1;
        $Alpha = isset($Format["Alpha"]) ? $Format["Alpha"] : 100;
        $FontName = isset($Format["FontName"]) ? $Format["FontName"] : NULL;
        $FontSize = isset($Format["FontSize"]) ? $Format["FontSize"] : NULL;

        if ($R != -1) {
            $this->FontColorR = $R;
        }
        if ($G != -1) {
            $this->FontColorG = $G;
        }
        if ($B != -1) {
            $this->FontColorB = $B;
        }
        if ($Alpha != NULL) {
            $this->FontColorA = $Alpha;
        }

        if ($FontName != NULL)
            $this->FontName = $FontName;

        if ($FontSize != NULL)
            $this->FontSize = $FontSize;
    }

    /* Returns the 1st decimal values (used to correct AA bugs) */
    /* 返回第一个十进制值 */
    function getFirstDecimal($Value)
    {
        $Values = preg_split("/\./", $Value);
        if (isset($Values[1])) {
            return (substr($Values[1], 0, 1));
        } else {
            return (0);
        }
    }

    /* Attach a dataset to your pChart Object */
    /* 附加pChart对象的数据集 */
    function setDataSet(&$DataSet)
    {
        $this->DataSet = $DataSet;
    }

    /* Print attached dataset contents to STDOUT */
    /* 附加数据集内容输出到标准输出 */
    function printDataSet()
    {
        print_r($this->DataSet);
    }

    /* Initialise the image map methods */
    /* 初始化图像映射方法 */
    function initialiseImageMap($Name = "pChart", $StorageMode = IMAGE_MAP_STORAGE_SESSION, $UniqueID = "imageMap", $StorageFolder = "tmp")
    {
        $this->ImageMapIndex = $Name;
        $this->ImageMapStorageMode = $StorageMode;

        if ($StorageMode == IMAGE_MAP_STORAGE_SESSION) {
            if (!isset($_SESSION)) {
                session_start();
            }
            $_SESSION[$this->ImageMapIndex] = NULL;
        } elseif ($StorageMode == IMAGE_MAP_STORAGE_FILE) {
            $this->ImageMapFileName = $UniqueID;
            $this->ImageMapStorageFolder = $StorageFolder;

            if (file_exists($StorageFolder . "/" . $UniqueID . ".map")) {
                unlink($StorageFolder . "/" . $UniqueID . ".map");
            }
        }
    }

    /* Add a zone to the image map */
    /* 添加一个图像映射区域 */
    function addToImageMap($Type, $Plots, $Color = NULL, $Title = NULL, $Message = NULL, $HTMLEncode = FALSE)
    {
        if ($this->ImageMapStorageMode == NULL) {
            $this->initialiseImageMap();
        }

        /* Encode the characters in the imagemap in HTML standards */
        $Title = str_replace("&#8364;", "\u20AC", $Title);
        $Title = htmlentities($Title, ENT_QUOTES, "ISO-8859-15");
        if ($HTMLEncode) {
            $Message = htmlentities($Message, ENT_QUOTES, "ISO-8859-15");
            $Message = str_replace("&lt;", "<", $Message);
            $Message = str_replace("&gt;", ">", $Message);
        }

        if ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_SESSION) {
            if (!isset($_SESSION)) {
                $this->initialiseImageMap();
            }
            $_SESSION[$this->ImageMapIndex][] = array($Type, $Plots, $Color, $Title, $Message);
        } elseif ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_FILE) {
            $Handle = fopen($this->ImageMapStorageFolder . "/" . $this->ImageMapFileName . ".map", 'a');
            fwrite($Handle, $Type . IMAGE_MAP_DELIMITER . $Plots . IMAGE_MAP_DELIMITER . $Color . IMAGE_MAP_DELIMITER . $Title . IMAGE_MAP_DELIMITER . $Message . "\r\n");
            fclose($Handle);
        }
    }

    /* Remove VOID values from an imagemap custom values array */
    /* 删除空白值的位图 自定义值数组 */
    function removeVOIDFromArray($SerieName, $Values)
    {
        if (!isset($this->DataSet->Data["Series"][$SerieName])) {
            return (-1);
        }

        $Result = "";
        foreach ($this->DataSet->Data["Series"][$SerieName]["Data"] as $Key => $Value) {
            if ($Value != VOID && isset($Values[$Key])) {
                $Result[] = $Values[$Key];
            }
        }
        return ($Result);
    }

    /* Replace the title of one image map serie */
    /* 替换一个图像的标题图意 */
    function replaceImageMapTitle($OldTitle, $NewTitle)
    {
        if ($this->ImageMapStorageMode == NULL) {
            return (-1);
        }

        if (is_array($NewTitle)) {
            $NewTitle = $this->removeVOIDFromArray($OldTitle, $NewTitle);
        }

        if ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_SESSION) {
            if (!isset($_SESSION)) {
                return (-1);
            }
            if (is_array($NewTitle)) {
                $ID = 0;
                foreach ($_SESSION[$this->ImageMapIndex] as $Key => $Settings) {
                    if ($Settings[3] == $OldTitle && isset($NewTitle[$ID])) {
                        $_SESSION[$this->ImageMapIndex][$Key][3] = $NewTitle[$ID];
                        $ID++;
                    }
                }
            } else {
                foreach ($_SESSION[$this->ImageMapIndex] as $Key => $Settings) {
                    if ($Settings[3] == $OldTitle) {
                        $_SESSION[$this->ImageMapIndex][$Key][3] = $NewTitle;
                    }
                }
            }
        } elseif ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_FILE) {
            $TempArray = "";
            $Handle = @fopen($this->ImageMapStorageFolder . "/" . $this->ImageMapFileName . ".map", "r");
            if ($Handle) {
                while (($Buffer = fgets($Handle, 4096)) !== false) {
                    $Fields = preg_split("/" . IMAGE_MAP_DELIMITER . "/", str_replace(array(chr(10), chr(13)), "", $Buffer));
                    $TempArray[] = array($Fields[0], $Fields[1], $Fields[2], $Fields[3], $Fields[4]);
                }
                fclose($Handle);

                if (is_array($NewTitle)) {
                    $ID = 0;
                    foreach ($TempArray as $Key => $Settings) {
                        if ($Settings[3] == $OldTitle && isset($NewTitle[$ID])) {
                            $TempArray[$Key][3] = $NewTitle[$ID];
                            $ID++;
                        }
                    }
                } else {
                    foreach ($TempArray as $Key => $Settings) {
                        if ($Settings[3] == $OldTitle) {
                            $TempArray[$Key][3] = $NewTitle;
                        }
                    }
                }

                $Handle = fopen($this->ImageMapStorageFolder . "/" . $this->ImageMapFileName . ".map", 'w');
                foreach ($TempArray as $Key => $Settings) {
                    fwrite($Handle, $Settings[0] . IMAGE_MAP_DELIMITER . $Settings[1] . IMAGE_MAP_DELIMITER . $Settings[2] . IMAGE_MAP_DELIMITER . $Settings[3] . IMAGE_MAP_DELIMITER . $Settings[4] . "\r\n");
                }
                fclose($Handle);
            }
        }
    }

    /* Replace the values of the image map contents */
    /* 替换位图的内容 */
    function replaceImageMapValues($Title, $Values)
    {
        if ($this->ImageMapStorageMode == NULL) {
            return (-1);
        }

        $Values = $this->removeVOIDFromArray($Title, $Values);
        $ID = 0;
        if ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_SESSION) {
            if (!isset($_SESSION)) {
                return (-1);
            }
            foreach ($_SESSION[$this->ImageMapIndex] as $Key => $Settings) {
                if ($Settings[3] == $Title) {
                    if (isset($Values[$ID])) {
                        $_SESSION[$this->ImageMapIndex][$Key][4] = $Values[$ID];
                    }
                    $ID++;
                }
            }
        } elseif ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_FILE) {
            $TempArray = "";
            $Handle = @fopen($this->ImageMapStorageFolder . "/" . $this->ImageMapFileName . ".map", "r");
            if ($Handle) {
                while (($Buffer = fgets($Handle, 4096)) !== false) {
                    $Fields = preg_split("/" . IMAGE_MAP_DELIMITER . "/", str_replace(array(chr(10), chr(13)), "", $Buffer));
                    $TempArray[] = array($Fields[0], $Fields[1], $Fields[2], $Fields[3], $Fields[4]);
                }
                fclose($Handle);

                foreach ($TempArray as $Key => $Settings) {
                    if ($Settings[3] == $Title) {
                        if (isset($Values[$ID])) {
                            $TempArray[$Key][4] = $Values[$ID];
                        }
                        $ID++;
                    }
                }

                $Handle = fopen($this->ImageMapStorageFolder . "/" . $this->ImageMapFileName . ".map", 'w');
                foreach ($TempArray as $Key => $Settings) {
                    fwrite($Handle, $Settings[0] . IMAGE_MAP_DELIMITER . $Settings[1] . IMAGE_MAP_DELIMITER . $Settings[2] . IMAGE_MAP_DELIMITER . $Settings[3] . IMAGE_MAP_DELIMITER . $Settings[4] . "\r\n");
                }
                fclose($Handle);
            }
        }
    }

    /* Dump the image map */
    /* 转存位图 */
    function dumpImageMap($Name = "pChart", $StorageMode = IMAGE_MAP_STORAGE_SESSION, $UniqueID = "imageMap", $StorageFolder = "tmp")
    {
        $this->ImageMapIndex = $Name;
        $this->ImageMapStorageMode = $StorageMode;

        if ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_SESSION) {
            if (!isset($_SESSION)) {
                session_start();
            }
            if ($_SESSION[$Name] != NULL) {
                foreach ($_SESSION[$Name] as $Key => $Params) {
                    echo $Params[0] . IMAGE_MAP_DELIMITER . $Params[1] . IMAGE_MAP_DELIMITER . $Params[2] . IMAGE_MAP_DELIMITER . $Params[3] . IMAGE_MAP_DELIMITER . $Params[4] . "\r\n";
                }
            }
        } elseif ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_FILE) {
            if (file_exists($StorageFolder . "/" . $UniqueID . ".map")) {
                $Handle = @fopen($StorageFolder . "/" . $UniqueID . ".map", "r");
                if ($Handle) {
                    while (($Buffer = fgets($Handle, 4096)) !== false) {
                        echo $Buffer;
                    }
                }
                fclose($Handle);

                if ($this->ImageMapAutoDelete) {
                    unlink($StorageFolder . "/" . $UniqueID . ".map");
                }
            }
        }

        /* When the image map is returned to the client, the script ends */
        exit();
    }

    /* Return the HTML converted color from the RGB composite values */
    /* 转换成16进制的色值 */
    function toHTMLColor($R, $G, $B)
    {
        $R = intval($R);
        $G = intval($G);
        $B = intval($B);
        $R = dechex($R < 0 ? 0 : ($R > 255 ? 255 : $R));
        $G = dechex($G < 0 ? 0 : ($G > 255 ? 255 : $G));
        $B = dechex($B < 0 ? 0 : ($B > 255 ? 255 : $B));
        $Color = "#" . (strlen($R) < 2 ? '0' : '') . $R;
        $Color .= (strlen($G) < 2 ? '0' : '') . $G;
        $Color .= (strlen($B) < 2 ? '0' : '') . $B;
        return ($Color);
    }

    /* Reverse an array of points */
    /* 反向点的数组 */
    function reversePlots($Plots)
    {
        $Result = "";
        for ($i = count($Plots) - 2; $i >= 0; $i = $i - 2) {
            $Result[] = $Plots[$i];
            $Result[] = $Plots[$i + 1];
        }
        return ($Result);
    }

    /* Mirror Effect */
    /* 镜面效果 */
    function drawAreaMirror($X, $Y, $Width, $Height, $Format = "")
    {
        $StartAlpha = isset($Format["StartAlpha"]) ? $Format["StartAlpha"] : 80;
        $EndAlpha = isset($Format["EndAlpha"]) ? $Format["EndAlpha"] : 0;

        $AlphaStep = ($StartAlpha - $EndAlpha) / $Height;

        $Picture = imagecreatetruecolor($this->XSize, $this->YSize);
        imagecopy($Picture, $this->Picture, 0, 0, 0, 0, $this->XSize, $this->YSize);

        for ($i = 1; $i <= $Height; $i++) {
            if ($Y + ($i - 1) < $this->YSize && $Y - $i > 0) {
                imagecopymerge($Picture, $this->Picture, $X, $Y + ($i - 1), $X, $Y - $i, $Width, 1, $StartAlpha - $AlphaStep * $i);
            }
        }

        imagecopy($this->Picture, $Picture, 0, 0, 0, 0, $this->XSize, $this->YSize);
    }
}

?>